The effect of de Sitter like background on increasing the zero point budget of dark energy

Understand

During this work, using subtraction renormalization mechanism, zero point quantum fluctuations for bosonic scalar fields in a de-Sitter like background are investigated.

• By virtue of the observed value for spectral index, $n_s(k)$, for massive scalar field the best value for the first slow roll parameter, $\epsilon$, is achieved.
• In addition the energy density of vacuum quantum fluctuations for massless scalar field is obtained.
• The effects of these fluctuations on other components of the Universe are studied.